There are a couple subs I believe that try to track bots. I say try because they don't exactly do any profound research due to most bots telling on themselves. But you get to see what patterns emerge from these bots: usernames are a big tell, a lot of them seem to be relying on the same script to generate usernames (probably pulled from the first reddit account creator repo they could find), and they repeat themselves a lot even if some nouns are changed (again indicating very primitive understanding of scripts). Another really huge tell, that only works if you're actively on reddit when it happens, is they reply to your comment instantly[1].
It also seems some are using these bots to change course of a subreddit [2], where they are upvoting/downvoting on mass (evading Reddit's usual bot trappings, which IIRC mostly stem from IP?). It's going to be very very interesting to see how easier access to bots is going to affect a lot of social sites.
There are two funny things about this entire situation: A) by attempting to call out these bots in some subs, you'll be warned/banned for brigading or being uncivil, and B) some subs have tried to be proactive about the situation but wound up being chastised[3] for various reasons like relying on AI detection tooling which produces a lot of false positives, and a general nonchalance as long as bots "post quality".
So basically, outside of external verification and pattern matching, you can't.
[1] https://www.reddit.com/r/TheseFuckingAccounts/comments/12ssf...
[2] https://www.reddit.com/r/botwatch/comments/125iurb/me_and_ot...
[3] https://www.reddit.com/r/patientgamers/comments/11vw6qp/post...